x86/tdx: Skip saving output regs when SEAMCALL fails with VMFailInvalid

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If SEAMCALL fails with VMFailInvalid, the SEAM software (e.g., the TDX
module) won't have chance to set any output register.  Skip saving the
output registers to the structure in this case.

Also, as '.Lno_output_struct' is the very last symbol before RET, rename
it to '.Lout' to make it short.

Opportunistically make the asm directives unindented.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/704088f5b4d72c7e24084f7f15bd1ac5005b7213.1692096753.git.kai.huang%40intel.com

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This commit is contained in:

Kai Huang 2023-08-15 23:01:56 +12:00 • committed by Dave Hansen

parent 5d092b6611

commit 03a423d40c

2 changed files with 20 additions and 12 deletions

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3

arch/x86/coco/tdx/tdcall.S

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29

arch/x86/virt/vmx/tdx/tdxcall.S

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